CN101999411A - Halloysite nano tube silver-carried monomer antibacterial agent and preparation method thereof - Google Patents
Halloysite nano tube silver-carried monomer antibacterial agent and preparation method thereof Download PDFInfo
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- CN101999411A CN101999411A CN2010105477112A CN201010547711A CN101999411A CN 101999411 A CN101999411 A CN 101999411A CN 2010105477112 A CN2010105477112 A CN 2010105477112A CN 201010547711 A CN201010547711 A CN 201010547711A CN 101999411 A CN101999411 A CN 101999411A
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- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000000178 monomer Substances 0.000 title abstract 2
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 35
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- 239000004332 silver Substances 0.000 claims abstract description 34
- 239000000969 carrier Substances 0.000 claims abstract description 21
- 238000011068 load Methods 0.000 claims description 50
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- FOIXSVOLVBLSDH-UHFFFAOYSA-N silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 claims description 22
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- ODGROJYWQXFQOZ-UHFFFAOYSA-N sodium;boron(1-) Chemical group [B-].[Na+] ODGROJYWQXFQOZ-UHFFFAOYSA-N 0.000 claims description 2
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- 239000000463 material Substances 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 2
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- LRJAGMBMPSXEFP-UDPUMDPQSA-N 2-[[[(1R)-1-[[(2R)-2-[3-acetamido-2-[[[(2R,3S,4R)-3,4-dihydroxy-5-(5-iodo-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-hydroxyphosphoryl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxypropanoyl]amino]ethyl]-hydroxyphosphoryl]methyl]penta Chemical compound CC(=O)NC1C(O[C@H](C)C(=O)N[C@@H](C)P(O)(=O)CC(CCC(O)=O)C(O)=O)C(O)C(CO)OC1OP(O)(=O)OP(O)(=O)OC[C@@H]1[C@@H](O)[C@@H](O)C(N2C(NC(=O)C(I)=C2)=O)O1 LRJAGMBMPSXEFP-UDPUMDPQSA-N 0.000 description 1
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Abstract
The invention belongs to the technical field of inorganic nonmetallic materials, and particularly relates to a halloysite nano tube silver-carried monomer antibacterial agent and a preparation method thereof. Silane coupling agent modified halloysite nano tubes are used as carriers in the antibacterial agent, and silver monomers are carried on the carriers. The antibacterial agent has the advantages of easily obtained raw materials, low cost, simple operation, wide condition, low energy consumption, environmental friendliness, wide application range and strong antibacterial activity.
Description
Technical field
The invention belongs to technical field of inorganic nonmetallic materials, particularly a kind of halloysite nanotubes load silver simple substance type antibacterial agent and preparation method thereof.
Background technology
In recent years, along with growth in the living standard, people are also more and more higher to the requirement of life.Therefore, the factor of harm humans health also more and more is subjected to people's attention.According to statistics, the death toll that the whole world causes because of bacterial infection every year is about 2,000 ten thousand people, accounts for 30% of total death toll, and this numeral is very startling.These noxious bacterias comprise Escherichia coli, staphylococcus aureus, mould etc.At present human just suffering with the bacterium is the harmful microorganism dead cat more and more of representative, and caused serious consequence, and the large-scale outbreak of epidemic diseases such as Escherichia coli, dengue fever, Hemorrhagic fever, SARS (Severe Acute Respiratory Syndrome) has caused human fear.Therefore, the research of the growth of control and elimination noxious bacteria and breeding is subjected to the great attention of countries in the world all the time.
Antibacterial agent is meant a small amount of high-effect anti-biotic material, adds the material that can produce antibacterial functions in other material to.Antibacterial agent can make the growth of certain micro-organisms (bacterium etc.) or breeding remain on necessary below horizontal within a certain period of time.Existing antibacterial agent can be divided into organic antibacterial agent, inorganic antiseptic and natural antibacterial agent three major types.Natural antibacterial agent is mainly got by extracted form natural plant, resource-constrained; Though organic antibacterial agent has the applicating history of decades, it is often poisonous easily to produce drug resistance and catabolite; Inorganic antiseptic is because stability, persistence, safety are good, has a broad antifungal spectrum, is difficult for the generation drug resistance and is suitable for advantage such as high temperature process forming antibacterial agent into first-selection.Inorganic antiseptic mainly utilizes the antibacterial ability of metals such as silver, copper, zinc, by methods such as physical adsorption, ion exchanges, antibacterial agent is made on the surface that metals such as silver, copper, zinc (or its ion) is fixed on porous materials such as zeolite, silica gel, then it is joined the material that promptly obtains to have antibacterial ability in the corresponding articles.
Wherein, copper and silver-colored being most widely used, and the sterilizing ability of silver is bigger than copper, and this is the advantage of silver base inorganic antibacterial agent.For example utilize silver-colored bactericidal action to prepare the chelated nano silver disinfection solution among the Chinese patent CN200610034625.5 by chelated nano silver, silicone oil and auxiliary agent.Be that solvent type latex paint and Nano Silver form the antimildew and antibacterial material under the effect of certain dispersant with water-soluble or water among the Chinese patent CN03114740.2, in manufacture craft, be in harmonious proportion, remedy the unicity of material, effect with antimildew and antibacterial, improved material safety in use, easy construction is easily gone.Chinese patent CN01243228.8 utilizes the bactericidal action of silver to design a kind of sodium rice silver sterilization shoe-pad.
But at present the production ubiquity of inorganic antiseptic that cost is higher, the preparation method is complicated and antibacterial effect is difficult to defectives such as lasting.
Summary of the invention
The object of the present invention is to provide a kind of new inorganic antiseptic, i.e. halloysite nanotubes load silver simple substance type antibacterial agent, and its preparation method further is provided, to overcome the defective of existing inorganic antiseptic preparation cost height, method complexity.
The technical solution used in the present invention is as follows:
Halloysite nanotubes load silver simple substance type antibacterial agent, described antibacterial agent is a carrier with silane coupler modified halloysite nanotubes, negative Ag-bearing simple substance on the carrier, the load capacity of silver-colored simple substance is 0.1-0.2g on every gram carrier.
It is silver-colored simple substance several sections that the preparation method of described halloysite nanotubes load silver simple substance type antibacterial agent mainly is divided into the preparation of carrier, carrier loaded silver ion, silver ion reduction, the below comparatively concrete step that provides various piece, but be not limited in accordance with the following methods:
Described carrier makes by laxative remedy: get and remove in the moisture halloysite nanotubes adding reaction medium afterwards, be added to halloysite nanotubes quality 1-2 silane coupler doubly afterwards, evenly disperse; Then nanotube is carried out modification, condition is: temperature 115-125 ℃, fully stir backflow 24-30 h; The product washing is drying to obtain silane coupler modified halloysite nanotubes, and described reaction medium is benzene, toluene, N, dinethylformamide or N,N-dimethylacetamide.
When removing the moisture in the halloysite nanotubes, can use the absolute ethanol washing halloysite nanotubes earlier, centrifugal then, dry; Can adopt emulsification instrument to carry out during dispersion, disperse 10-15min to get final product.After the halloysite nanotubes modification, use the mixed liquor of isopropyl alcohol and toluene or isopropyl alcohol and benzene to wash last 50 ℃ of following vacuum dryings 4-5 time.
The step of carrier loaded silver ion is as follows: be added to the halloysite nanotubes behind silver salt quality 75-100% silane coupler modified in silver salt is dissolved in the solution of methyl alcohol or ethanol, fully separates the halloysite nanotubes that is drying to obtain load silver ion after the load.
Silver salt can be selected silver nitrate.Can select behind the magnetic agitation 1-2h normal temperature constant temperature vibration 24-30h in shaking table during load.
The step of the silver ion of reduction halloysite nanotubes load is: take by weighing the halloysite nanotubes and the reductant of load silver ion, regulate pH to 7.5-8.5, abundant reaction back is separated dry, promptly gets the halloysite nanotubes antibacterial agent of the silver-colored simple substance of load.
Described reductant is preferably sodium borohydride or sodium citrate, and addition is the 3-5% of the halloysite nanotubes quality of load silver ion.
Nanotube of the present invention is the both ends open shape, and length is 0.5-2 μ m, uniform diameter (about 30nm).Halloysite nanotubes is a natural products, mainly originates in the ground such as Sichuan, Henan and Shanxi of China, can buy acquisition.The used halloysite nanotubes of the present invention is that nanotube is produced in Henan.
The present invention utilizes natural halloysite nanotubes to be carrier, and silver-colored simple substance is fully loaded on the halloysite nanotubes, has prepared the halloysite nanotubes antibacterial agent of load silver simple substance.Its advantage of mainly having utilized this body structure of nanotube is that tube wall has a large amount of hydroxyls, is easy to organically-modifiedly, and bigger specific surface area can improve the contact area of silver-colored simple substance and microorganism, thereby improves antibacterial effect.In addition, described antibacterial agent has good hydrothermal stability, and the tubular structure that finds no nanotube 400 ℃ of long-time down calcinings destroys.In addition, chemical property is also highly stable, and this material has tangible competitive advantage, is expected to obtain extensive use in the field of antibacterial film, antibiotic plastic, anti-bacteria ceramic.
The present invention has following advantage with respect to prior art:
Raw material of the present invention is easy to get, cost is lower; Simple to operate, condition is loose; Less energy consumption, environmental friendliness; The product applied range, antibacterial activity is stronger.
Description of drawings
Fig. 1 is the X-ray diffractogram (b) and the X-ray diffractogram (a) of the carrier of load silver simple substance not of halloysite nanotubes antibacterial agent of the load silver simple substance of the embodiment of the invention 1 preparation;
Fig. 2 is transmission electron microscope (TEM) figure of halloysite nanotubes antibacterial agent of the load silver simple substance of the embodiment of the invention 1 preparation;
Fig. 3, Fig. 4 are the inhibition zone figure as a result of the antibacterial agent of the embodiment of the invention 1 preparation, and corresponding bacterial classification is respectively Escherichia coli and staphylococcus aureus;
Fig. 5, Fig. 6 are the inhibition zone figure as a result of the antibacterial agent of the embodiment of the invention 2 preparation, and corresponding bacterial classification is respectively Escherichia coli and staphylococcus aureus.
Embodiment:
Below with specific embodiment technical scheme of the present invention is described, but protection scope of the present invention is not limited thereto:
Halloysite nanotubes described in following examples is the HNT-CEE type product available from Chemical Engineering research institute of Zhengzhou University.
Embodiment 1
Taking by weighing the 10g halloysite nanotubes of removing after the moisture is added in the 150ml toluene, add the 15g silane coupler, emulsification instrument disperseed 10 minutes, insert there-necked flask and carry out modification, modified condition is: 125 ℃ of temperature, and the stirring rod rotating speed is made as 500r/min, backflow 24h, product washs 4 times with the mixed liquor of isopropyl alcohol and toluene, and last 50 ℃ of following vacuum dryings obtain silane coupler modified halloysite nanotubes.With 8g AgNO
3Be dissolved in the 100 ml methyl alcohol, add the halloysite nanotubes after the 7g modification in solution, magnetic agitation 1 h is in shaking table 60
oUnder the C, constant temperature 24 h that vibrate, product is centrifugal, spend deionised water 3 times, 60 ℃ of following vacuum dryings promptly make the halloysite nanotubes of load silver ion.Take by weighing the halloysite nanotubes 5g and the 0.15g NaHB of load silver ion
4, add the NaOH solution prepare, regulate pH to 8.0, stir 2 h, product is centrifugal, washing, vacuum drying promptly make the halloysite nanotubes antibacterial agent of load silver simple substance, and the load capacity of silver-colored simple substance is 0.145g on every gram carrier.The XRD figure of the carrier before described antibacterial agent and the load is not seen Fig. 1, contrast as can be known, peak figure (b) has been Duoed 5 peaks than peak figure (a), and five characteristic peaks that crest just in time is simple substance Ag that this has more.The TEM figure of described antibacterial agent sees Fig. 2, can see that the particle diameter that evenly distributed on the halloysite nanotubes surface is the simple substance silver of 5nm.
This powder carries out the detection of bacteriostasis property by the following method, takes by weighing beef extract 5.0g, peptone 10.0g, and sodium chloride 5.0g adds 1000ml distilled water, and pH to 7.2-7.4 is transferred in fully dissolving, and 121 ℃ of sterilization 20min obtain liquid nutrient medium.Get the 20ml liquid culture based in the conical flask with liquid-transfering gun, the bacterial classification (Escherichia coli and staphylococcus aureus) of picking 1-2 ring activation is put into 37 ℃ with conical flask in liquid nutrient medium, cultivate 24h in the shaking table of 160r/min, obtains bacterium liquid.Add the 15g agar powder in remaining above-mentioned liquid nutrient medium, 121 ℃ of sterilization 20min are cooled to 60 ℃.Under aseptic condition, this liquid medium to be poured in the culture dish, cooling obtains beef-protein medium.Cultured bacterium liquid is diluted to 10
-4, draw 0.2ml in good culture dish, glass bar smoothens.Put on medium gently with aseptic nipper gripping antibacterial agent to be measured, pave and form the identical round shape of size, lie against 1-2 h on the experimental bench, make medicine infiltrate the medium top layer, be inverted then and cultivate 24 h in 37 ℃ of constant incubators, observed result is measured antibacterial circle diameter, repeat 3 times, average.This antibacterial agent to colibacillary inhibition zone size is: internal diameter is 7mm, and external diameter is 12mm; Inhibition zone size to staphylococcus aureus is: internal diameter is 5mm, and external diameter is 9mm.
Embodiment 2
Taking by weighing the 10g halloysite nanotubes of removing after the moisture is added in the 150ml benzene, add the 20g silane coupler, emulsification instrument disperseed 15 minutes, insert there-necked flask and carry out modification, modified condition is: 115 ℃ of temperature, and the stirring rod rotating speed is made as 500r/min, refluxed 24 hours, product washs 5 times with the mixed liquor of isopropyl alcohol and toluene, and last 50 ℃ of following vacuum dryings obtain silane coupler modified halloysite nanotubes.With 8g AgNO
3Be dissolved in the 100 ml methyl alcohol, add the halloysite nanotubes after the 8g modification in solution, magnetic agitation 2 h are in shaking table 60
oUnder the C, constant temperature 24 h that vibrate, product is centrifugal, spend deionised water 4 times, 60 ℃ of following vacuum dryings promptly make the halloysite nanotubes of load silver ion.Take by weighing the halloysite nanotubes 5g and the 0.25g sodium citrate of load silver ion, add the NaOH solution prepare, regulate pH to 8.0, stir 1 h, product is centrifugal, washing, vacuum drying promptly make the halloysite nanotubes antibacterial agent of load silver simple substance.
By the detection method of embodiment 1 products therefrom is carried out bacteriostasis property and detect, this antibacterial agent to colibacillary inhibition zone size is: internal diameter is 7mm, and external diameter is 13mm; Inhibition zone size to staphylococcus aureus is: internal diameter is 5mm, and external diameter is 8mm.
Claims (10)
1. halloysite nanotubes load silver simple substance type antibacterial agent is characterized in that described antibacterial agent is a carrier with silane coupler modified halloysite nanotubes, negative Ag-bearing simple substance on the carrier, and the load capacity of silver-colored simple substance is 0.1-0.2g on every gram carrier.
2. halloysite nanotubes load silver simple substance type antibacterial agent as claimed in claim 1, it is characterized in that, described carrier makes by laxative remedy: get and remove in the moisture halloysite nanotubes adding reaction medium afterwards, be added to halloysite nanotubes quality 1-2 silane coupler doubly afterwards, evenly disperse; Then nanotube is carried out modification, condition is: temperature 115-125 ℃, fully stir backflow 24-30 h; The product washing is drying to obtain silane coupler modified halloysite nanotubes, and described reaction medium is benzene, toluene, N, dinethylformamide or N,N-dimethylacetamide.
3. halloysite nanotubes load silver simple substance type antibacterial agent as claimed in claim 1 or 2, it is characterized in that, first load silver ion reduces then and obtains silver-colored simple substance behind the carrier of acquisition modification, the step of carrier loaded silver ion is as follows: be added to the halloysite nanotubes behind silver salt quality 75-100% silane coupler modified in silver salt is dissolved in the solution of methyl alcohol or ethanol, fully separates the halloysite nanotubes that is drying to obtain load silver ion after the load.
4. halloysite nanotubes load silver simple substance type antibacterial agent as claimed in claim 3, it is characterized in that, the step of the silver ion of reduction halloysite nanotubes load is: the halloysite nanotubes and the reductant that take by weighing load silver ion, regulate pH to 7.5-8.5, fully drying is separated in the reaction back, promptly gets the halloysite nanotubes antibacterial agent of load silver simple substance.
5. the method for preparing halloysite nanotubes load silver simple substance type antibacterial agent as claimed in claim 1, it is characterized in that, step is as follows: get and remove in the moisture halloysite nanotubes adding reaction medium afterwards, be added to halloysite nanotubes quality 1-2 silane coupler doubly afterwards, evenly disperse; Then nanotube is carried out modification, condition is: temperature 115-125 ℃, fully stir backflow 24-30 h; The product washing is drying to obtain silane coupler modified halloysite nanotubes, and described reaction medium is benzene, toluene, N, dinethylformamide or N,N-dimethylacetamide; Obtain behind the carrier of modification first load silver ion and reduce the halloysite nanotubes that obtains load silver simple substance then.
6. the method for preparing halloysite nanotubes load silver simple substance type antibacterial agent as claimed in claim 5, it is characterized in that, the step of carrier loaded silver ion is as follows: be added to the halloysite nanotubes behind silver salt quality 75-100% silane coupler modified in silver salt is dissolved in the solution of methyl alcohol or ethanol, fully separates the halloysite nanotubes that is drying to obtain load silver ion after the load.
7. the method for preparing halloysite nanotubes load silver simple substance type antibacterial agent as claimed in claim 6, it is characterized in that, the step of the silver ion of reduction halloysite nanotubes load is: the halloysite nanotubes and the reductant that take by weighing load silver ion, regulate pH to 7.5-8.5, fully drying is separated in the reaction back, promptly gets the halloysite nanotubes antibacterial agent of load silver simple substance.
8. the method for preparing halloysite nanotubes load silver simple substance type antibacterial agent as claimed in claim 7 is characterized in that described reductant is sodium borohydride or sodium citrate, and addition is the 3-5% of the halloysite nanotubes quality of load silver ion.
9. the method for preparing halloysite nanotubes load silver simple substance type antibacterial agent as claimed in claim 5 is characterized in that, after the halloysite nanotubes modification, uses the mixed liquor of isopropyl alcohol and toluene or isopropyl alcohol and benzene to wash last 50 ℃ of following vacuum dryings 4-5 time.
10. as the described method for preparing halloysite nanotubes load silver simple substance type antibacterial agent of one of claim 5-9, it is characterized in that described nanotube is the both ends open shape, length is 0.5-2 μ m.
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| US9981074B1 (en) | 2015-09-25 | 2018-05-29 | Louisiana Tech Research Corporation | Method for metalizing nanotubes through electrolysis |
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